Machine for bending sheet metal



IINrrn STATES 'If rrr en.

`MACHINE FOR BENDING SHEET METAL.

Specification forining part of Letters Patent Nov llfl, dated February7, 1865.

To @ZZ whom, it may concer/z:

-Beit known that I, SAMUEL PnNNocK, of Kennett Square, in the county ofChester and State of Pennsylvania, have invented a Machine for BendingMetal, and I do hereby declare the following to be a full and correctdescription of the same, reference being had to the accompanyingdrawings, in which- Figurel is a perspective view ofthe machinecomplete. Fig. 2is a front elevation of the same. Fig. 3 is a sideelevation. Fig. 4 is a plan or top view. Fig. 5 is a centrallongitudinal section on line y y of Fig. 4, and Fig. 6 is a transversevertical section of a part of Ithe machine on line a' :v of Fig. 3.

The same part is marked by the same letter of reference wherever itoccurs.

The nature of my invention consists in the peculiar construction andarrangement of the machine, hereinafter described, for bending sheet orbar metal, and more particularly in the devices or their equivalents forgiving the vertical and horizontal adjustments to the movable bed of themachine, the whole constituting a substantial, convenient, efficient,and economical apparatus for the purpose intended.

To enable others to make and use my bending-machine, I will proceed todescribe its construction and operation, referring to the drawings,whereon A marks the end framing of the machine, and B the cross-framing,both made of iron, and of a strength and size proportioned to the workto be done.

G is a horizontal adjustable bed or anvil on which the metal is bent.The ends D of this bed project beyond the side frame, and are receivedin collars on the adjustable screw-connecting rod E. These collars turnfreely on the ends D. The rear ends of rods E screw into stout collarsF, which encircle the eccentrics G. These eccentrics are attached ateither end lof shaft K. The projecting ends H of this shaft are providedwith sockets J, for the insertion of handspikes, by which the shaft andeccentrics are turned, to adjust horizontally the position-of the bed C.The first' adjustment is made by the screw-rods E, the ii'nal one by theturning 'of the eccentric G.

L marks the hammer or bending-jaw, which turns on heavy journals M,supported in the end framing. Sockets for the reception of handspikesare made in this jaw at the points N N,

l andthe jaw is worked by means of handspikes or levers inserted inthem. When in the position represented in Fig. 5, the lower edge of jawL rests upon a solid piece, B, of the crossframing, the front edge ofsaid piece being vertical, and serving as a support for the sheet or barof metal that is being operated upon. This piece B stands in the samerelation to the bed C that the fixed jaw of a vise occupies to themovable jaw, the bed C being moved toward or bed C rests at either endupon the slotted pieces P. These pieces slide vertically between guidesc on the bolts d, which pass through the slots c and side frame, A, andare secured by nuts on the outside, as clearly shown in Fig. 6. Theslotted pieces P overlap and rest upon the straddle-pieces Q, which intheir turn are supported by the eccentrics R, which turn freely tric Rhas on its inner side the cap S, which serves to confine the lower edgeof the pieces Q. The shaft T of the eccentric R (sec Fig. 6) turns inthe end frame, A. It is prolonged so tached to itby means of a washercontrolled by nut W. The wheel U has sockets in its periphery for thereception of levers or handspikes, by means ef which the eccentric R isturned to adjust vertically the position of the bed C.

Y marks a gage-stock, which is attached to apart, Z, of the frame bymeans of the bolt z' and its nut and washer passing up through a slot inthe horizontal part of the gage-stock. In this stock are held thegage-rods A B, any required number of which may be employed. These areadjusted vertically by means of the set-'screws h. Their oice is tosupport the lower edge of the sheet orbar of metal which is beingoperated on. Y f

The operation of the machine is as follows: The piece of metal to bebent is placed in the machine between the piece B and the bed C,

supporting-gages A B, which are so adj usted that the line at which themetal is to be bent shall coincide with the upper and rear margin of thebed C, which is brought into close contact with the metal sheet by theoperation of the eccentrics G. The bed C, by means of the eccentrics R,is lowered till its upper surface is below the lower and forward marginof the fro mit by the operation ofthe eccentric G. The l in theirconcave under surfaces. The `eccen as to receive the fixed wheel U,which is atits lower edge resting on one or more ofthe hammer-jaw L adistance equal to the thiol;- ness of the sheet to be bent. By means oflevers inserted at the points NN the jaw L is closed down until themetal sheet is brought into contact With the upper face of the bed C.rlhe bending is then complete. The hammerjaw is again raised, the graspof the bed C upon the sheet is relaxed by apartial turn of eccentric G,and the bent metal is removed from the machine preparatory to therepetition of the operation. In the case here described the metal isbent at a right angle; but by m'eans of supplemental pieces placed onthe upper surface of bed C and held there by toesinserted in therecesses a a the angle may be varied at pleasure.

It will be observed that the adjustable connecting-rods E are outsidethe end framing, and can readily be removed from the ends at thejournals D when an adjustment is to be made, and then slipped on again,for which purpose sufticient play is given to the strap or collar F. Itwill also be noticed that the bed C, being conned only by the collars onthe ends of its journals D, can be turned up at any desired angle on itsjournals or removed entirely from the machine, if desired, by slippingoff the collars just alluded it. This gives the machine the capabilityof bending more angles in the same piece ofiron than it would y have ifthese facilities for the removal of the bent pieces did not exist.Ibelieve they have never before been provided in a machine for thispurpose. l

` Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

` 1. The hinged removable and adjustable bed-plate C, constructed andoperating as described.

2. In combination with the above, the mode described of adj usting thebed-plate C horizontally by means ofthe eccentric G, arranged andoperating as shown, or in an equivalent manner, for producing the sameresult.

3. In a machine for bending metal, constructed as described, adjustingthe bed-plate G vertically by the employment of the eccenltric R,arranged and operated as shown, or

its equivalent, substantially in the manner speciiied. Y

The above speciication of my said invention signed and witnessed atPhiladelphia this 18th day of October, A. D. 1864.

SAMUEL PENNOCK.

Vitnesses: y

CHAs. F. SrANsBURY, E. B. PALMER.

